/* roulang page: index */
/* ============ 设计变量 ============ */
:root{
  --ink:#0E3B36;
  --ink-deep:#08211F;
  --ink-soft:#0B2C28;
  --lime:#C9F45B;
  --coral:#FF6B4A;
  --bg:#F5F4EF;
  --card:#FFFFFF;
  --band:#EDEBE4;
  --text:#16181A;
  --text-2:#5A5F5C;
  --text-3:#8B9190;
  --line:#DEDCD4;
  --line-dark:rgba(245,244,239,.14);
  --r-card:16px;
  --r-img:14px;
  --r-badge:8px;
  --r-btn:12px;
  --r-pill:999px;
  --sh-1:0 2px 8px rgba(14,59,54,.06);
  --sh-2:0 12px 32px rgba(14,59,54,.12);
  --sp:24px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:.2s var(--ease);
  --font-cn:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Space Grotesk",Inter,"SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
}
/* ============ reset ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
body{
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px;}
/* ============ 容器 ============ */
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
/* ============ 头部 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(245,244,239,.92);
  backdrop-filter:blur(6px);
  transition:box-shadow var(--t),background var(--t);
}
.site-header.is-scrolled{
  background:rgba(245,244,239,.96);
  border-bottom:1px solid var(--line);
  box-shadow:0 2px 12px rgba(14,59,54,.06);
}
.notice-bar{background:var(--ink-deep);color:rgba(245,244,239,.88);font-size:13px;line-height:1.6;}
.notice-inner{display:flex;align-items:center;gap:10px;min-height:38px;}
.notice-dot{width:6px;height:6px;border-radius:50%;background:var(--lime);flex:none;}
.notice-inner p{flex:1;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;}
.notice-close{font-size:16px;line-height:1;color:rgba(245,244,239,.6);padding:6px 8px;border-radius:6px;transition:color var(--t);}
.notice-close:hover{color:var(--lime);}
.header-inner{
  display:flex;align-items:center;gap:20px;
  min-height:76px;
  transition:min-height var(--t);
}
.site-header.is-scrolled .header-inner{min-height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex:none;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:none;
  background:linear-gradient(150deg,var(--ink) 0%,var(--ink-deep) 100%);
  color:var(--lime);font-weight:800;font-size:19px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-1);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:17px;font-weight:800;letter-spacing:-.2px;color:var(--ink);}
.brand-text em{font-style:normal;font-size:11px;letter-spacing:.16em;color:var(--text-3);}
.nav-chips{
  display:flex;align-items:center;gap:8px;
  margin-left:8px;flex:1;
  overflow-x:auto;scrollbar-width:none;
  scroll-snap-type:x proximity;
}
.nav-chips::-webkit-scrollbar{display:none;}
.chip{
  flex:none;scroll-snap-align:start;
  height:36px;display:inline-flex;align-items:center;
  padding:0 14px;border-radius:var(--r-badge);
  background:var(--band);color:rgba(14,59,54,.8);
  font-size:14px;font-weight:600;
  border-bottom:2px solid transparent;
  transition:background var(--t),color var(--t),border-color var(--t);
}
.chip:hover{background:#E3E0D6;color:var(--ink);}
.chip.is-active{background:var(--ink);color:#F5F4EF;border-bottom-color:var(--lime);}
.header-cta{flex:none;margin-left:24px;padding-left:24px;border-left:1px solid var(--line);}
.nav-toggle-input{display:none;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
  border:1px solid var(--line);background:var(--card);
}
.nav-toggle span{width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform var(--t);}
.drawer{
  position:fixed;inset:0;z-index:90;background:var(--bg);
  padding:24px;display:none;flex-direction:column;
  overflow-y:auto;
}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
.drawer-title{font-size:13px;letter-spacing:.16em;color:var(--text-3);}
.drawer-close{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:18px;}
.drawer-group{font-size:12px;letter-spacing:.16em;color:var(--text-3);margin:20px 0 8px;}
.drawer a.drawer-link{
  display:flex;align-items:center;min-height:56px;
  border-bottom:1px solid var(--line);
  font-size:18px;font-weight:700;color:var(--ink);
}
.drawer a.drawer-link.is-active{color:var(--ink);border-bottom-color:var(--ink);}
.drawer-cta{margin-top:28px;}
/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
  border:1px solid transparent;white-space:nowrap;
}
.btn-primary{background:var(--lime);color:#101613;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--ink);color:#F5F4EF;box-shadow:var(--sh-2);}
.btn-ghost{background:transparent;border-color:rgba(14,59,54,.35);color:var(--ink);}
.btn-ghost:hover{border-color:var(--ink);background:rgba(14,59,54,.06);transform:translateY(-1px);}
.btn-light{background:#F5F4EF;color:var(--ink);}
.btn-light:hover{background:var(--lime);color:#101613;}
.btn-outline-light{background:transparent;border-color:rgba(245,244,239,.35);color:#F5F4EF;}
.btn-outline-light:hover{border-color:var(--lime);color:var(--lime);}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;}
.btn-lg{min-height:54px;padding:0 30px;font-size:16px;}
.btn-pill{border-radius:var(--r-pill);}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:700;color:var(--ink);
}
.link-arrow::after{content:"→";transition:transform var(--t);}
.link-arrow:hover::after{transform:translateX(4px);}
/* ============ 通用板块 ============ */
.section{padding:96px 0;}
.section-tight{padding:64px 0;}
.section-head{max-width:720px;margin-bottom:40px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--ink);text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--lime);border-radius:2px;}
h1{font-size:52px;line-height:1.15;font-weight:800;letter-spacing:-.5px;}
h2{font-size:34px;line-height:1.25;font-weight:700;letter-spacing:-.3px;}
h3{font-size:21px;line-height:1.4;font-weight:700;}
h4{font-size:17px;line-height:1.5;font-weight:600;}
.sec-num{
  font-family:var(--font-num);font-size:14px;font-weight:700;
  color:var(--ink);background:var(--lime);border-radius:6px;
  padding:2px 8px;margin-right:12px;vertical-align:middle;
  letter-spacing:.04em;
}
.lead{font-size:17px;color:var(--text-2);line-height:1.85;}
.badge{
  display:inline-flex;align-items:center;
  padding:3px 10px;border-radius:var(--r-badge);
  font-size:12px;font-weight:700;letter-spacing:.02em;
}
.badge-primary{background:rgba(14,59,54,.08);color:var(--ink);}
.badge-lime{background:var(--lime);color:#101613;}
.badge-line{background:transparent;border:1px solid var(--line-dark);color:rgba(245,244,239,.8);}
/* ============ Hero ============ */
.hero{
  position:relative;
  padding:72px 0 88px;
  background:
    radial-gradient(900px 420px at 12% -10%,rgba(201,244,91,.16),transparent 62%),
    var(--bg);
  overflow:hidden;
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.hero-copy{animation:heroIn .5s var(--ease) both;}
@keyframes heroIn{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:none;}}
.hero h1{margin-bottom:20px;}
.hero h1 .hl{
  background:linear-gradient(transparent 62%,rgba(201,244,91,.75) 0);
  padding:0 2px;
}
.hero-sub{font-size:19px;color:var(--text-2);max-width:540px;margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px;}
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);
  padding-top:24px;gap:18px;
}
.metric strong{
  display:block;font-family:var(--font-num);
  font-size:26px;font-weight:700;color:var(--ink);line-height:1.2;
}
.metric span{font-size:13px;color:var(--text-3);letter-spacing:.02em;}
.hero-visual{position:relative;}
.hero-figure{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-2);background:var(--band);
  aspect-ratio:16/9;
}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.hero-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(200deg,rgba(8,33,31,.20) 0%,rgba(8,33,31,.35) 100%);
}
.hero-card{
  position:absolute;right:-12px;bottom:-28px;width:290px;
  background:var(--card);border-radius:var(--r-card);
  border:1px solid var(--line);box-shadow:var(--sh-2);
  padding:20px;
}
.hero-card h3{font-size:15px;margin-bottom:14px;color:var(--ink);}
.hero-card ul li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:13.5px;color:var(--text-2);line-height:1.7;
  padding:7px 0;border-bottom:1px dashed var(--line);
}
.hero-card ul li:last-child{border-bottom:0;padding-bottom:0;}
.hero-card ul li i{
  flex:none;width:6px;height:6px;border-radius:50%;
  background:var(--lime);margin-top:9px;
}
/* ============ 深色主推横卡 ============ */
.feature-band{
  margin-top:56px;
  background:linear-gradient(120deg,var(--ink) 0%,var(--ink-deep) 100%);
  border-radius:var(--r-card);
  padding:32px;
  display:grid;grid-template-columns:220px 1fr auto;gap:32px;align-items:center;
  color:#F5F4EF;position:relative;overflow:hidden;
}
.feature-band::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(520px 260px at 88% 10%,rgba(201,244,91,.14),transparent 70%);
  pointer-events:none;
}
.feature-thumb{
  border-radius:var(--r-img);overflow:hidden;aspect-ratio:4/3;background:var(--ink-soft);
}
.feature-thumb img{width:100%;height:100%;object-fit:cover;}
.feature-body h3{font-size:24px;margin-bottom:10px;}
.feature-body p{color:rgba(245,244,239,.72);font-size:15px;margin-bottom:14px;}
.feature-points{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:4px;}
.feature-side{display:flex;flex-direction:column;gap:12px;align-items:flex-start;}
/* ============ 爆款网格 ============ */
.grid-feature{display:grid;grid-template-columns:repeat(6,1fr);gap:24px;}
.card{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);
  display:flex;flex-direction:column;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#CFCCC2;}
.card-media{position:relative;aspect-ratio:4/3;background:var(--band);overflow:hidden;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.card:hover .card-media img{transform:scale(1.03);}
.card-media .badge{position:absolute;left:12px;top:12px;background:rgba(255,255,255,.94);color:var(--ink);box-shadow:var(--sh-1);}
.card-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body p{font-size:14.5px;color:var(--text-2);line-height:1.75;}
.card-foot{margin-top:auto;padding-top:8px;}
.card h3 a{position:relative;display:inline;background-image:linear-gradient(var(--ink),var(--ink));background-size:0 1px;background-repeat:no-repeat;background-position:0 100%;transition:background-size .3s var(--ease);}
.card:hover h3 a{background-size:100% 1px;}
.span-3{grid-column:span 3;}
.span-4{grid-column:span 4;}
.span-2{grid-column:span 2;}
.card-wide .card-media{aspect-ratio:16/9;}
/* ============ 最新信息（CMS） ============ */
.news-layout{display:grid;grid-template-columns:8fr 4fr;gap:40px;align-items:start;}
.timeline{position:relative;padding-left:28px;}
.timeline::before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:1px;background:var(--line);}
.news-item{position:relative;padding:0 0 28px;margin-bottom:28px;border-bottom:1px solid var(--line);}
.news-item:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0;}
.news-dot{
  position:absolute;left:-28px;top:8px;width:11px;height:11px;border-radius:50%;
  background:var(--lime);border:2px solid var(--bg);
  box-shadow:0 0 0 1px var(--ink);
}
.news-meta{display:flex;align-items:center;gap:12px;margin-bottom:8px;}
.news-time{font-family:var(--font-num);font-size:13px;color:var(--text-3);letter-spacing:.02em;}
.news-title{font-size:20px;line-height:1.45;margin-bottom:8px;}
.news-title a{background-image:linear-gradient(var(--ink),var(--ink));background-size:0 1px;background-repeat:no-repeat;background-position:0 100%;transition:background-size .3s var(--ease);}
.news-title a:hover{background-size:100% 1px;}
.news-summary{font-size:15px;color:var(--text-2);line-height:1.8;margin-bottom:10px;}
.side-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;box-shadow:var(--sh-1);margin-bottom:24px;
}
.side-card h3{font-size:16px;margin-bottom:14px;color:var(--ink);}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  font-size:13px;padding:6px 12px;border-radius:var(--r-badge);
  background:var(--band);color:var(--ink);font-weight:600;transition:background var(--t),color var(--t);
}
.tag:hover{background:var(--ink);color:#F5F4EF;}
.side-list li{padding:10px 0;border-bottom:1px dashed var(--line);font-size:14.5px;color:var(--text-2);}
.side-list li:last-child{border-bottom:0;}
.side-list li a:hover{color:var(--ink);}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-card);
  padding:40px 28px;text-align:center;background:var(--card);
}
.empty-state svg{width:36px;height:36px;stroke:var(--text-3);margin:0 auto 14px;}
.empty-state p{font-size:15px;color:var(--text-2);margin-bottom:18px;}
/* ============ 评价轮播 ============ */
.rail-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;}
.rail-ctrls{display:flex;gap:10px;}
.rail-btn{
  width:44px;height:44px;border-radius:50%;
  border:1px solid rgba(14,59,54,.3);
  display:flex;align-items:center;justify-content:center;
  color:var(--ink);transition:background var(--t),color var(--t),border-color var(--t);
}
.rail-btn:hover{background:var(--ink);color:#F5F4EF;border-color:var(--ink);}
.reviews-track{
  display:flex;gap:24px;overflow-x:auto;
  scroll-snap-type:x mandatory;padding-bottom:12px;
  scrollbar-width:none;
}
.reviews-track::-webkit-scrollbar{display:none;}
.review-card{
  flex:0 0 340px;scroll-snap-align:start;
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-1);
}
.review-quote{
  font-family:var(--font-num);font-size:40px;line-height:1;
  color:var(--lime);margin-bottom:8px;
}
.stars{display:flex;gap:3px;margin-bottom:12px;}
.stars i{width:14px;height:14px;background:var(--ink);clip-path:polygon(50% 0,61% 35%,98% 35%,68% 57%,79% 91%,50% 70%,21% 91%,32% 57%,2% 35%,39% 35%);}
.review-card p{font-size:15px;color:var(--text-2);line-height:1.85;margin-bottom:16px;}
.review-user{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--text-3);}
.avatar{
  width:34px;height:34px;border-radius:50%;background:var(--ink);
  color:var(--lime);display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:14px;
}
/* ============ 保障条 ============ */
.guarantee{background:var(--band);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.guarantee-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.g-item{padding:34px 26px;border-right:1px solid rgba(222,220,212,.9);}
.g-item:last-child{border-right:0;}
.g-item svg{width:26px;height:26px;stroke:var(--ink);margin-bottom:12px;}
.g-item h4{font-size:16px;margin-bottom:6px;}
.g-item p{font-size:13.5px;color:var(--text-2);line-height:1.7;}
/* ============ 转化大区块 ============ */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--ink-deep);
  color:#F5F4EF;border-radius:var(--r-card);
  padding:96px 48px;text-align:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  opacity:.08;
}
.cta-band-inner{position:relative;z-index:1;max-width:720px;margin:0 auto;}
.cta-band h2{color:#F5F4EF;margin-bottom:16px;}
.cta-band p{color:rgba(245,244,239,.72);font-size:17px;margin-bottom:32px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;align-items:center;}
/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;font-size:17px;font-weight:700;color:var(--text);
  transition:color var(--t);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--ink);}
.faq-item summary .plus{
  flex:none;width:26px;height:26px;border-radius:50%;
  border:1px solid rgba(14,59,54,.28);position:relative;
  transition:transform .24s var(--ease),background var(--t),border-color var(--t);
}
.faq-item summary .plus::before,
.faq-item summary .plus::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--ink);
  transform:translate(-50%,-50%);
}
.faq-item summary .plus::before{width:10px;height:1.6px;}
.faq-item summary .plus::after{width:1.6px;height:10px;}
.faq-item[open] summary .plus{transform:rotate(90deg);background:var(--lime);border-color:var(--lime);}
.faq-answer{padding:0 0 24px 14px;font-size:15.5px;color:var(--text-2);line-height:1.9;max-width:860px;}
/* ============ 页脚 ============ */
.site-footer{background:var(--ink-deep);color:rgba(245,244,239,.7);padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{background:rgba(245,244,239,.08);color:var(--lime);}
.footer-brand strong{font-size:16px;color:#F5F4EF;font-weight:800;}
.footer-brand em{font-style:normal;display:block;font-size:11px;letter-spacing:.16em;color:rgba(245,244,239,.45);}
.site-footer p{font-size:13.5px;line-height:1.8;}
.footer-col h4{font-size:14px;color:#F5F4EF;margin-bottom:16px;letter-spacing:.04em;}
.footer-col li{margin-bottom:10px;font-size:13.5px;}
.footer-col a{transition:color var(--t);}
.footer-col a:hover{color:var(--lime);}
.footer-bottom{
  border-top:1px solid var(--line-dark);
  padding:22px 0;display:flex;flex-wrap:wrap;gap:12px;
  justify-content:space-between;font-size:13px;color:rgba(245,244,239,.5);
}
/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:70;
  width:46px;height:46px;border-radius:50%;
  background:var(--ink);color:#F5F4EF;border:1px solid rgba(245,244,239,.16);
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);opacity:0;pointer-events:none;
  transition:opacity var(--t),transform var(--t),background var(--t);
}
.to-top.is-visible{opacity:1;pointer-events:auto;}
.to-top:hover{background:var(--lime);color:#101613;}
/* ============ 响应式 ============ */
@media (max-width:1279px){
  h1{font-size:46px;}
  h2{font-size:31px;}
}
@media (max-width:1023px){
  .section{padding:72px 0;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-visual{order:-1;}
  .hero-card{position:relative;right:auto;bottom:auto;width:100%;margin-top:-24px;}
  .feature-band{grid-template-columns:1fr;gap:22px;padding:26px;}
  .feature-thumb{aspect-ratio:16/9;max-width:420px;}
  .grid-feature{grid-template-columns:repeat(2,1fr);}
  .span-4,.span-3,.span-2{grid-column:span 1;}
  .news-layout{grid-template-columns:1fr;gap:32px;}
  .guarantee-grid{grid-template-columns:repeat(2,1fr);}
  .g-item:nth-child(2){border-right:0;}
  .g-item:nth-child(1),.g-item:nth-child(2){border-bottom:1px solid rgba(222,220,212,.9);}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  h1{font-size:32px;}
  h2{font-size:26px;}
  h3{font-size:19px;}
  .section{padding:56px 0;}
  .notice-inner{min-height:34px;}
  .nav-chips,.header-cta{display:none;}
  .header-inner{min-height:64px;justify-content:space-between;}
  .nav-toggle{display:flex;}
  .nav-toggle-input:checked ~ .nav-toggle span:nth-child(1){transform:translateY(6px) rotate(45deg);}
  .nav-toggle-input:checked ~ .nav-toggle span:nth-child(2){opacity:0;}
  .nav-toggle-input:checked ~ .nav-toggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
  .nav-toggle-input:checked ~ .drawer{display:flex;}
  .hero{padding:40px 0 64px;}
  .hero-sub{font-size:16.5px;}
  .hero-actions .btn{flex:1 1 auto;}
  .metrics{grid-template-columns:repeat(2,1fr);gap:16px;}
  .grid-feature{grid-template-columns:1fr;gap:18px;}
  .review-card{flex:0 0 84%;}
  .guarantee-grid{grid-template-columns:1fr;}
  .g-item{border-right:0;border-bottom:1px solid rgba(222,220,212,.9);padding:26px 0;}
  .g-item:last-child{border-bottom:0;}
  .cta-band{padding:56px 24px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .to-top{right:16px;bottom:16px;}
}
@media (max-width:380px){
  h1{font-size:28px;}
  .brand-text strong{font-size:15px;}
  .btn{padding:0 16px;font-size:14px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
  .card:hover{transform:none;}
  .card:hover .card-media img{transform:none;}
}

/* roulang page: article */
/* ===================== 设计变量 ===================== */
:root{
  --ink:#0E3B36;
  --ink-deep:#08211F;
  --ink-layer:#0B2C28;
  --lime:#C9F45B;
  --coral:#FF6B4A;
  --bg:#F5F4EF;
  --card:#FFFFFF;
  --soft:#EDEBE4;
  --soft-deep:#E3E0D7;
  --text:#16181A;
  --text-2:#5A5F5C;
  --text-3:#8B9190;
  --warm:#F5F4EF;
  --line:#DEDCD4;
  --line-dark:rgba(245,244,239,.14);
  --r-card:16px;
  --r-img:14px;
  --r-badge:8px;
  --r-pill:999px;
  --sh-1:0 2px 8px rgba(14,59,54,.06);
  --sh-2:0 12px 32px rgba(14,59,54,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --t:.2s;
  --max:1220px;
}
/* ===================== 基础 reset ===================== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color var(--t) var(--ease),background-color var(--t) var(--ease),border-color var(--t) var(--ease)}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea,select{font:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:6px}
::selection{background:var(--lime);color:#16181A}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ===================== 公告条 ===================== */
.notice-bar{background:var(--ink-deep);color:var(--warm);font-size:13px;letter-spacing:.04em}
.notice-inner{display:flex;align-items:center;gap:10px;min-height:38px}
.notice-dot{width:7px;height:7px;border-radius:50%;background:var(--lime);flex:0 0 auto}
.notice-inner p{flex:1;line-height:1.4;color:rgba(245,244,239,.86)}
.notice-link{color:var(--lime);font-weight:600;white-space:nowrap;border-bottom:1px solid rgba(201,244,91,.4)}
.notice-link:hover{color:#fff;border-bottom-color:#fff}

/* ===================== 头部 ===================== */
.site-header{position:sticky;top:0;z-index:70;background:rgba(245,244,239,.92);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);transition:box-shadow var(--t) var(--ease),border-color var(--t) var(--ease)}
.site-header.is-stuck{border-bottom:1px solid var(--line);box-shadow:var(--sh-1)}
.header-main{padding:14px 0;transition:padding var(--t) var(--ease)}
.site-header.is-stuck .header-main{padding:6px 0}
.header-inner{display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:38px;height:38px;border-radius:12px;background:var(--ink);color:var(--lime);display:grid;place-items:center;font-size:19px;font-weight:800;flex:0 0 auto}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:17px;font-weight:800;letter-spacing:-.2px;color:var(--ink)}
.brand-text em{font-style:normal;font-size:11.5px;letter-spacing:.16em;color:var(--text-3);margin-top:2px}
.nav-chips{display:flex;align-items:center;gap:8px;flex:1;justify-content:center;min-width:0}
.chip{position:relative;display:inline-flex;align-items:center;height:36px;padding:0 14px;border-radius:8px;background:var(--soft);color:rgba(14,59,54,.8);font-size:14.5px;font-weight:600;white-space:nowrap;transition:background-color var(--t) var(--ease),color var(--t) var(--ease)}
.chip:hover{background:var(--soft-deep);color:var(--ink)}
.chip.is-active{background:var(--ink);color:var(--warm)}
.chip.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:5px;height:2px;border-radius:2px;background:var(--lime)}
.header-actions{display:flex;align-items:center;gap:16px;flex:0 0 auto;padding-left:24px;border-left:1px solid var(--line);position:relative}

/* 按钮族 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 22px;border-radius:var(--r-pill);font-size:15px;font-weight:700;border:1px solid transparent;transition:background-color var(--t) var(--ease),color var(--t) var(--ease),border-color var(--t) var(--ease),transform var(--t) var(--ease)}
.btn svg{flex:0 0 auto}
.btn-primary{background:var(--lime);color:#16181A}
.btn-primary:hover{background:var(--ink);color:var(--warm)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-outline:hover{background:rgba(14,59,54,.06)}
.btn-ghost-dark{border-color:var(--line-dark);color:var(--warm)}
.btn-ghost-dark:hover{background:rgba(245,244,239,.1)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.4;box-shadow:none;pointer-events:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:700;font-size:14.5px;color:var(--ink)}
.link-arrow svg{transition:transform var(--t) var(--ease)}
.link-arrow:hover svg{transform:translateX(4px)}

/* 汉堡与抽屉 */
.nav-toggle-cb{display:none}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:var(--card);align-items:center;justify-content:center;flex-direction:column;gap:4px;cursor:pointer}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink)}
.drawer{position:fixed;inset:0;z-index:120;visibility:hidden;opacity:0;transition:opacity .22s var(--ease),visibility .22s var(--ease)}
.drawer-mask{position:absolute;inset:0;background:rgba(8,33,31,.6);display:block}
.drawer-panel{position:absolute;top:0;right:0;width:min(88vw,360px);height:100%;background:var(--bg);padding:20px 20px 32px;overflow-y:auto;box-shadow:var(--sh-2);transform:translateX(100%);transition:transform .26s var(--ease)}
.nav-toggle-cb:checked ~ .drawer{visibility:visible;opacity:1}
.nav-toggle-cb:checked ~ .drawer .drawer-panel{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;gap:10px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-head strong{font-size:16px;font-weight:800;color:var(--ink);flex:1}
.drawer-close{width:40px;height:40px;border-radius:12px;border:1px solid var(--line);display:grid;place-items:center;font-size:20px;line-height:1;color:var(--text-2);cursor:pointer}
.drawer-close:hover{background:var(--soft)}
.drawer-group{margin:22px 0 8px;font-size:12px;letter-spacing:.16em;color:var(--text-3);font-weight:700}
.drawer-link{display:flex;align-items:center;height:56px;padding:0 12px;border-radius:12px;font-size:16.5px;font-weight:600;color:var(--text);border-bottom:1px solid var(--line)}
.drawer-link:hover{background:var(--soft);color:var(--ink)}
.drawer-cta{margin-top:24px;width:100%}

/* ===================== 面包屑 ===================== */
.breadcrumb{padding:22px 0 6px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--text-3)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--line);font-weight:400}
.breadcrumb a{color:var(--text-2)}
.breadcrumb a:hover{color:var(--ink)}
.breadcrumb .is-current{color:var(--ink);font-weight:600;max-width:min(56vw,520px);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ===================== 文章头区 ===================== */
.article-hero{padding:18px 0 0}
.badge{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:var(--r-badge);font-size:12.5px;font-weight:700;letter-spacing:.02em}
.badge-ink{background:rgba(14,59,54,.08);color:var(--ink)}
.badge-lime{background:var(--lime);color:#16181A}
.article-title{margin-top:16px;font-size:clamp(30px,4.4vw,52px);line-height:1.15;font-weight:800;letter-spacing:-.5px;color:var(--ink);max-width:960px}
.article-lead{margin-top:18px;max-width:820px;font-size:17px;line-height:1.85;color:var(--text-2)}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;margin-top:22px;font-size:13.5px;color:var(--text-3)}
.meta-row li{display:inline-flex;align-items:center;gap:7px}
.meta-row li svg{color:var(--ink);opacity:.75}
.meta-sep{width:1px;height:14px;background:var(--line);display:inline-block}
.article-cover{margin-top:28px;border-radius:var(--r-card);overflow:hidden;background:var(--soft);box-shadow:var(--sh-1);aspect-ratio:16/9;position:relative}
.article-cover img{width:100%;height:100%;object-fit:cover}
.article-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(14,59,54,.14),rgba(14,59,54,0) 45%);pointer-events:none}

/* ===================== 正文布局 ===================== */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:56px;padding:52px 0 96px}
.article-main{min-width:0;max-width:760px}
.article-body{counter-reset:h2c;font-size:17.5px;line-height:1.9;color:#23262A;word-break:break-word}
.article-body p{margin:0 0 1.2em}
.article-body strong{font-weight:700;color:var(--text)}
.article-body a{color:var(--ink);font-weight:600;border-bottom:1px solid rgba(14,59,54,.28)}
.article-body a:hover{border-bottom-color:var(--ink);background:rgba(201,244,91,.35)}
.article-body h2{counter-increment:h2c;display:flex;align-items:center;gap:12px;margin:2.2em 0 .9em;font-size:28px;line-height:1.3;font-weight:800;letter-spacing:-.3px;color:var(--ink)}
.article-body h2::before{content:counter(h2c,decimal-leading-zero);flex:0 0 auto;display:inline-grid;place-items:center;min-width:38px;height:28px;padding:0 8px;border-radius:8px;background:var(--lime);color:#16181A;font-size:14px;font-weight:800;letter-spacing:.02em}
.article-body h3{margin:1.8em 0 .6em;font-size:20px;line-height:1.45;font-weight:700;color:var(--ink)}
.article-body h4{margin:1.4em 0 .5em;font-size:17px;font-weight:700;color:var(--text)}
.article-body ul,.article-body ol{margin:0 0 1.3em}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:.55em}
.article-body ul li::before{content:"";position:absolute;left:3px;top:.72em;width:7px;height:7px;border-radius:2px;background:var(--lime);border:1px solid var(--ink)}
.article-body ol{counter-reset:olc}
.article-body ol li{position:relative;padding-left:36px;counter-increment:olc;margin-bottom:.6em}
.article-body ol li::before{content:counter(olc);position:absolute;left:0;top:.28em;width:22px;height:22px;border-radius:7px;background:var(--ink);color:var(--warm);font-size:12.5px;font-weight:700;display:grid;place-items:center;line-height:1}
.article-body blockquote{margin:1.6em 0;padding:16px 20px;border-left:4px solid var(--ink);background:var(--soft);border-radius:0 12px 12px 0;color:var(--text-2)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:1.6em 0;width:100%}
.article-body figure{margin:1.6em 0}
.article-body figcaption{margin-top:8px;text-align:center;font-size:13.5px;color:var(--text-3);letter-spacing:.02em}
.article-body hr{margin:2.4em 0;border:0;height:1px;background:var(--line)}
.article-body table{font-size:15.5px;margin:0 0 1.6em;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.article-body th{background:var(--soft);font-weight:700;text-align:left;color:var(--ink)}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);line-height:1.7}
.article-body tbody tr:nth-child(even){background:#FAFAF7}
.article-body tbody tr:last-child td{border-bottom:0}
.article-body code{background:var(--soft);padding:2px 6px;border-radius:6px;font-size:14.5px}

/* 空态 */
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:64px 24px;border:1px dashed var(--line);border-radius:var(--r-card);background:var(--card);text-align:center}
.empty-state svg{color:var(--ink);opacity:.5}
.empty-state p{font-size:16px;color:var(--text-2);margin:0}
.empty-state .empty-tip{font-size:13.5px;color:var(--text-3)}

/* 标签行 */
.article-tags{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:52px;padding-top:24px;border-top:1px solid var(--line)}
.article-tags .tag-label{font-size:13px;letter-spacing:.14em;color:var(--text-3);font-weight:700;margin-right:2px}
.tag{display:inline-flex;align-items:center;height:30px;padding:0 12px;border-radius:var(--r-badge);background:var(--soft);color:var(--ink);font-size:13.5px;font-weight:600}
.tag:hover{background:var(--ink);color:var(--warm)}

/* 上一篇 / 下一篇 */
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:32px}
.post-nav-card{display:flex;flex-direction:column;gap:6px;padding:20px;border:1px solid var(--line);border-radius:var(--r-card);background:var(--card);box-shadow:var(--sh-1);transition:box-shadow var(--t) var(--ease),border-color var(--t) var(--ease),transform var(--t) var(--ease)}
.post-nav-card:hover{box-shadow:var(--sh-2);border-color:rgba(14,59,54,.24);transform:translateY(-2px)}
.post-nav-card span{font-size:12.5px;letter-spacing:.14em;color:var(--text-3);font-weight:700}
.post-nav-card strong{font-size:16px;line-height:1.5;color:var(--ink);font-weight:700}
.post-nav-card em{font-style:normal;font-size:13px;color:var(--text-3)}
.post-nav-card.is-next{text-align:right;align-items:flex-end}

/* 返回栏目 */
.back-entry{display:flex;justify-content:center;margin-top:40px}

/* ===================== 侧栏 ===================== */
.side{display:flex;flex-direction:column;gap:20px;position:sticky;top:100px;align-self:start}
.side-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-1)}
.side-card h3{font-size:15px;font-weight:800;color:var(--ink);letter-spacing:.02em;display:flex;align-items:center;gap:8px}
.side-card h3::before{content:"";width:4px;height:15px;border-radius:2px;background:var(--lime)}
.toc-list{margin-top:14px;display:flex;flex-direction:column;gap:2px;max-height:320px;overflow:auto}
.toc-list li a{display:block;padding:8px 10px 8px 14px;border-left:2px solid var(--line);font-size:14px;color:var(--text-2);line-height:1.5;transition:all var(--t) var(--ease)}
.toc-list li a:hover{border-left-color:var(--ink);background:var(--soft);color:var(--ink)}
.toc-empty{padding:8px 10px 8px 14px;border-left:2px solid var(--line);font-size:13.5px;color:var(--text-3)}
.side-latest{margin-top:14px;display:flex;flex-direction:column}
.side-latest li{border-bottom:1px solid var(--line)}
.side-latest li:last-child{border-bottom:0}
.side-latest a{display:block;padding:11px 0;font-size:14.5px;line-height:1.55;color:var(--text-2);font-weight:600}
.side-latest a:hover{color:var(--ink)}
.side-latest em{display:block;font-style:normal;font-size:12.5px;color:var(--text-3);margin-top:4px;font-weight:400}
.side-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.side-promo{background:var(--ink-deep);border:1px solid var(--ink-layer);color:var(--warm)}
.side-promo h3{color:var(--warm)}
.side-promo p{margin-top:10px;font-size:14px;line-height:1.8;color:rgba(245,244,239,.78)}
.side-promo .btn{margin-top:16px;width:100%}

/* ===================== 相关推荐 ===================== */
.related{padding:0 0 96px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section-head h2{font-size:clamp(26px,3vw,34px);line-height:1.25;font-weight:800;letter-spacing:-.4px;color:var(--ink)}
.section-head p{margin-top:8px;font-size:15px;color:var(--text-2);max-width:620px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:box-shadow var(--t) var(--ease),transform var(--t) var(--ease)}
.card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.card-media{position:relative;aspect-ratio:16/9;background:var(--soft);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .24s var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-media .badge{position:absolute;top:12px;left:12px;background:rgba(245,244,239,.94);color:var(--ink)}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17.5px;line-height:1.45;font-weight:700;color:var(--ink)}
.card-body h3 a{background-image:linear-gradient(var(--ink),var(--ink));background-size:0 1px;background-repeat:no-repeat;background-position:0 100%;transition:background-size .24s var(--ease)}
.card:hover .card-body h3 a{background-size:100% 1px}
.card-body p{font-size:14.5px;line-height:1.75;color:var(--text-2)}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3)}
.card-foot svg{color:var(--ink);transition:transform var(--t) var(--ease)}
.card:hover .card-foot svg{transform:translateX(4px)}

/* ===================== FAQ ===================== */
.faq-section{padding:0 0 96px}
.faq-list{border-top:1px solid var(--line);background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:0}
.faq-item summary{display:flex;align-items:center;gap:14px;padding:20px 22px;cursor:pointer;font-size:16.5px;font-weight:700;color:var(--ink);list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"";width:12px;height:12px;margin-left:auto;flex:0 0 auto;border-right:2px solid var(--ink);border-bottom:2px solid var(--ink);transform:rotate(45deg);transition:transform var(--t) var(--ease)}
.faq-item[open] summary::after{transform:rotate(225deg)}
.faq-item summary:hover{background:var(--soft)}
.faq-answer{padding:0 22px 22px 36px;font-size:15.5px;line-height:1.85;color:var(--text-2);max-width:820px}

/* ===================== CTA 区块 ===================== */
.cta-band{position:relative;background:var(--ink-deep);color:var(--warm);border-radius:var(--r-card);overflow:hidden;padding:72px 48px;margin-bottom:96px}
.cta-band::before{content:"";position:absolute;inset:0;background-image:url("/assets/images/backpic/back-2.png");background-size:cover;background-position:center;opacity:.08;pointer-events:none}
.cta-band-inner{position:relative;max-width:680px}
.cta-band h2{font-size:clamp(26px,3.2vw,36px);line-height:1.25;font-weight:800;letter-spacing:-.4px}
.cta-band p{margin-top:14px;font-size:16px;line-height:1.85;color:rgba(245,244,239,.78);max-width:600px}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:28px}
.cta-note{font-size:13.5px;color:rgba(245,244,239,.62)}

/* ===================== 页脚 ===================== */
.site-footer{background:var(--ink-deep);color:rgba(245,244,239,.78);font-size:14px;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:var(--ink-layer);color:var(--lime)}
.footer-brand strong{display:block;font-size:16px;font-weight:800;color:var(--warm);line-height:1.3}
.footer-brand em{font-style:normal;font-size:11.5px;letter-spacing:.16em;color:rgba(245,244,239,.5)}
.footer-col p{font-size:13.5px;line-height:1.85;color:rgba(245,244,239,.66);max-width:360px}
.footer-col h4{margin:0 0 16px;font-size:14px;font-weight:800;color:var(--warm);letter-spacing:.04em}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col li{font-size:13.5px;color:rgba(245,244,239,.66);line-height:1.7}
.footer-col ul a{color:rgba(245,244,239,.72)}
.footer-col ul a:hover{color:var(--lime)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;margin-top:48px;padding-top:24px;border-top:1px solid var(--line-dark);font-size:13px;color:rgba(245,244,239,.55)}

/* ===================== 返回顶部 ===================== */
.to-top{position:fixed;right:24px;bottom:28px;z-index:80;width:46px;height:46px;border-radius:50%;background:var(--ink);color:var(--lime);display:grid;place-items:center;box-shadow:var(--sh-2);opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity var(--t) var(--ease),transform var(--t) var(--ease),visibility var(--t) var(--ease)}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--ink-layer)}

/* ===================== 响应式 ===================== */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr) 288px;gap:40px}
}
@media (max-width:1023px){
  .nav-chips{justify-content:flex-start;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;-ms-overflow-style:none;padding:2px 0}
  .nav-chips::-webkit-scrollbar{display:none}
  .chip{flex:0 0 auto;scroll-snap-align:start}
  .header-actions{border-left:0;padding-left:0}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:36px}
  .article-main{max-width:none}
  .side{position:static;order:2}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{padding:56px 32px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .nav-chips{display:none}
  .nav-toggle{display:inline-flex}
  .header-inner{gap:12px}
  .brand-text strong{font-size:15.5px}
  .brand-text em{letter-spacing:.1em}
  .btn{height:46px;padding:0 20px}
  .article-title{font-size:clamp(28px,7.4vw,34px)}
  .article-lead{font-size:16px}
  .article-body{font-size:17px}
  .article-body h2{font-size:23px}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch}
  .post-nav{grid-template-columns:1fr}
  .post-nav-card.is-next{text-align:left;align-items:flex-start}
  .related-grid{grid-template-columns:1fr}
  .related,.faq-section{padding-bottom:64px}
  .cta-band{padding:44px 22px;margin-bottom:64px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .to-top{right:16px;bottom:20px}
  .faq-answer{padding-left:22px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
}
@media (max-width:380px){
  .brand-text em{display:none}
  .btn{font-size:14px;padding:0 16px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .card:hover,.post-nav-card:hover{transform:none}
  .card:hover .card-media img{transform:none}
}

/* roulang page: category1 */
:root{
  --brand:#0E3B36;
  --brand-dark:#08211F;
  --brand-layer:#0B2C28;
  --lime:#C9F45B;
  --coral:#FF6B4A;
  --bg:#F5F4EF;
  --card:#FFFFFF;
  --soft:#EDEBE4;
  --text:#16181A;
  --text-2:#5A5F5C;
  --text-3:#8B9190;
  --line:#DEDCD4;
  --line-dark:rgba(245,244,239,.14);
  --r-card:16px;
  --r-img:14px;
  --r-badge:8px;
  --r-btn:999px;
  --sh-1:0 2px 8px rgba(14,59,54,.06);
  --sh-2:0 12px 32px rgba(14,59,54,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"Space Grotesk","Inter",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
h1,h2,h3,h4,p,figure,ol,ul{margin:0}
ol,ul{padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* 公告条 */
.announce{background:var(--brand-dark);color:rgba(245,244,239,.82);font-size:13px;letter-spacing:.04em}
.announce-inner{display:flex;align-items:center;gap:10px;padding:9px 24px}
.announce-dot{width:6px;height:6px;border-radius:50%;background:var(--lime);flex:0 0 auto}
.announce p{line-height:1.5}

/* 头部 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(245,244,239,.94);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 4px 18px rgba(14,59,54,.06)}
.header-inner{display:flex;align-items:center;gap:24px;padding:14px 0;transition:padding .22s var(--ease)}
.site-header.is-stuck .header-inner{padding:8px 0}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:38px;height:38px;border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(150deg,var(--brand),var(--brand-dark));
  color:var(--lime);font-weight:800;font-size:18px;letter-spacing:0;
  box-shadow:var(--sh-1);
}
.brand-text strong{display:block;font-size:17px;font-weight:800;letter-spacing:-.2px;line-height:1.2}
.brand-text em{display:block;font-style:normal;font-size:12px;letter-spacing:.16em;color:var(--text-3);line-height:1.4}
.nav-chips{display:flex;align-items:center;gap:8px;flex:1;justify-content:center;flex-wrap:nowrap}
.chip{
  position:relative;display:inline-flex;align-items:center;height:36px;padding:0 14px;
  border-radius:8px;background:var(--soft);color:rgba(14,59,54,.8);
  font-size:14px;font-weight:600;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.chip:hover{background:#E3E0D6;color:var(--brand)}
.chip.is-active{background:var(--brand);color:#F5F4EF}
.chip.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:-2px;height:2px;border-radius:2px;background:var(--lime)}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;padding-left:24px;border-left:1px solid var(--line)}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);flex-direction:column;align-items:center;justify-content:center;gap:4px}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--brand);border-radius:2px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--lime);color:#08211F}
.btn-primary:hover{background:var(--brand);color:#F5F4EF}
.btn-ghost{border:1px solid var(--brand);color:var(--brand)}
.btn-ghost:hover{background:rgba(14,59,54,.06)}
.btn-ghost.on-dark{border-color:rgba(245,244,239,.42);color:#F5F4EF}
.btn-ghost.on-dark:hover{background:rgba(245,244,239,.12);border-color:rgba(245,244,239,.7)}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none;box-shadow:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--brand);transition:gap .2s var(--ease)}
.link-arrow::after{content:"→";transition:transform .2s var(--ease)}
.link-arrow:hover::after{transform:translateX(4px)}
.on-dark-text{color:rgba(245,244,239,.85)}

/* 抽屉 */
.drawer{
  position:fixed;inset:0;z-index:90;background:var(--bg);
  padding:18px 20px 40px;overflow-y:auto;
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
}
.drawer.is-open{opacity:1;visibility:visible;transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.drawer-close{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);font-size:22px;line-height:1;color:var(--brand)}
.drawer-group{font-size:12px;letter-spacing:.16em;color:var(--text-3);margin:22px 0 4px}
.drawer-link{display:flex;align-items:center;height:56px;font-size:18px;font-weight:600;border-bottom:1px solid var(--line)}
.drawer-link:active{color:var(--brand)}
.drawer-cta{margin-top:26px;width:100%}

/* 面包屑 */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;letter-spacing:.03em}
.breadcrumb a{color:rgba(245,244,239,.72)}
.breadcrumb a:hover{color:var(--lime)}
.breadcrumb .sep{color:rgba(245,244,239,.4)}
.breadcrumb .current{color:var(--lime);font-weight:700}

/* 页头 */
.page-hero{
  position:relative;color:#F5F4EF;overflow:hidden;
  padding:36px 0 64px;
  background:
    linear-gradient(180deg,rgba(8,33,31,.94),rgba(8,33,31,.84)),
    var(--brand-dark) url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
}
.hero-grid{display:grid;grid-template-columns:1.38fr 1fr;gap:48px;align-items:center;margin-top:28px}
.hero-eyebrow{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:var(--r-badge);
  background:rgba(201,244,91,.16);color:var(--lime);
  font-size:13px;font-weight:700;letter-spacing:.08em;
}
.hero-title{font-size:clamp(30px,4.4vw,52px);line-height:1.16;font-weight:800;letter-spacing:-.5px;margin-top:18px;max-width:19em}
.hero-sub{font-size:18px;line-height:1.7;color:rgba(245,244,239,.82);margin-top:20px;max-width:32em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-figure{
  margin:0;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line-dark);background:var(--soft);
  box-shadow:0 20px 48px rgba(0,0,0,.3);
}
.hero-figure img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-figure figcaption{font-size:13px;color:rgba(245,244,239,.7);background:rgba(11,44,40,.92);padding:10px 14px}
.hero-metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  margin-top:48px;padding-top:24px;border-top:1px solid var(--line-dark);
}
.hero-metrics strong{display:block;font-family:var(--mono);font-size:20px;font-weight:700;color:#F5F4EF;font-variant-numeric:tabular-nums}
.hero-metrics span{font-size:13px;color:rgba(245,244,239,.66)}

/* 主区域 */
.section{padding:88px 0}
.section-tight{padding:72px 0 96px}
.layout-2col{display:grid;grid-template-columns:262px minmax(0,1fr);gap:56px;align-items:start}
.toc-inner{position:sticky;top:96px}
.toc-title{font-size:12px;letter-spacing:.16em;color:var(--text-3);margin-bottom:10px}
.toc-list li a{
  display:block;padding:10px 12px;font-size:14px;color:var(--text-2);
  border-left:2px solid var(--line);border-radius:0 8px 8px 0;
  transition:color .18s var(--ease),border-color .18s var(--ease),background .18s var(--ease);
}
.toc-list li a:hover{color:var(--brand);border-left-color:var(--lime);background:var(--card)}

.content-block{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:34px;box-shadow:var(--sh-1);margin-bottom:32px;
  transition:box-shadow .22s var(--ease),transform .22s var(--ease);
}
.content-block:hover{box-shadow:var(--sh-2)}
.content-block.is-plain{background:var(--soft);border-color:#E2DFD5;box-shadow:none}
.content-block.is-plain:hover{box-shadow:none}
.section-title{display:flex;align-items:baseline;gap:12px;font-size:clamp(23px,2.5vw,31px);font-weight:700;line-height:1.3;letter-spacing:-.3px}
.h2-num{
  flex:0 0 auto;font-family:var(--mono);font-size:13px;font-weight:800;letter-spacing:.08em;
  color:var(--brand);background:rgba(201,244,91,.6);border-radius:6px;padding:3px 8px;
}
.content p{margin-top:16px;font-size:16.5px;color:var(--text-2)}
.content p.lead{color:var(--text)}
.content h3{font-size:19px;font-weight:700;margin-top:26px}

/* 要点列表 */
.point-list{margin-top:18px;display:grid;gap:12px}
.point-list li{position:relative;padding-left:26px;font-size:15.5px;color:var(--text-2)}
.point-list li::before{
  content:"";position:absolute;left:2px;top:11px;width:9px;height:9px;border-radius:3px;
  background:var(--lime);border:1px solid rgba(14,59,54,.28);
}
.point-list li strong{color:var(--text);font-weight:700}

/* 步骤 */
.step-list{margin-top:22px}
.step-list li{display:grid;grid-template-columns:44px minmax(0,1fr);gap:16px;padding:20px 0;border-bottom:1px dashed var(--line)}
.step-list li:last-child{border-bottom:0;padding-bottom:0}
.step-num{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:var(--brand);color:var(--lime);font-family:var(--mono);font-size:14px;font-weight:700;
}
.step-body strong{display:block;font-size:17px;font-weight:700;letter-spacing:-.1px}
.step-body p{margin-top:6px;font-size:15px;color:var(--text-2)}

/* 小卡组 */
.mini-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:22px}
.mini-card{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:20px;transition:border-color .2s var(--ease),transform .2s var(--ease)}
.mini-card:hover{border-color:rgba(14,59,54,.35);transform:translateY(-2px)}
.mini-card .idx{display:block;font-family:var(--mono);font-size:12px;font-weight:800;letter-spacing:.1em;color:var(--brand)}
.mini-card h3{font-size:16.5px;font-weight:700;margin-top:10px}
.mini-card p{font-size:14px;color:var(--text-2);margin-top:8px;line-height:1.7}

/* 内联 CTA */
.cta-inline{
  display:flex;align-items:center;justify-content:space-between;gap:22px;flex-wrap:wrap;
  background:linear-gradient(120deg,var(--brand),var(--brand-dark));
  color:#F5F4EF;border-radius:var(--r-card);padding:24px 28px;margin:0 0 32px;
}
.cta-inline p{font-size:16px;line-height:1.6;max-width:34em}
.cta-inline p strong{color:var(--lime)}

/* FAQ */
.faq{margin-top:18px}
.faq details{border-bottom:1px solid var(--line);padding:16px 0}
.faq details:first-of-type{border-top:1px solid var(--line)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:16.5px;font-weight:700;cursor:pointer;list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";flex:0 0 auto;width:24px;height:24px;border-radius:8px;
  display:grid;place-items:center;background:var(--soft);color:var(--brand);
  font-size:16px;font-weight:700;transition:transform .2s var(--ease),background .2s var(--ease);
}
.faq details[open] summary::after{content:"−";background:var(--lime)}
.faq-answer{padding-left:14px;margin-top:12px;font-size:15.5px;color:var(--text-2)}

/* 深色转化块 */
.cta-block{
  position:relative;overflow:hidden;color:#F5F4EF;
  background:var(--brand-dark);padding:96px 0;text-align:center;
}
.cta-block::before{
  content:"";position:absolute;inset:0;
  background:url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  opacity:.08;
}
.cta-block .container{position:relative;z-index:1}
.cta-block h2{font-size:clamp(26px,3.2vw,38px);font-weight:800;letter-spacing:-.4px;line-height:1.28}
.cta-block p{margin-top:16px;font-size:17px;color:rgba(245,244,239,.8);max-width:38em;margin-left:auto;margin-right:auto}
.cta-block .cta-actions{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:20px;margin-top:34px}

/* 相关文章 */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:28px}
.card{
  display:flex;flex-direction:column;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);transition:box-shadow .22s var(--ease),transform .22s var(--ease);
}
.card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.card-media{background:var(--soft);aspect-ratio:16/9;overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .24s var(--ease)}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:18px;display:flex;flex-direction:column;gap:10px}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-badge);
  background:rgba(14,59,54,.08);color:var(--brand);font-size:12px;font-weight:700;letter-spacing:.02em;
}
.card-body h3{font-size:16.5px;font-weight:700;line-height:1.5}
.card:hover .card-body h3{text-decoration:underline;text-underline-offset:4px;text-decoration-color:var(--lime);text-decoration-thickness:2px}
.card-meta{font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums}
.back-home{margin-top:34px}

/* 页脚 */
.site-footer{background:var(--brand-dark);color:rgba(245,244,239,.74);padding:64px 0 28px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(245,244,239,.1);color:var(--lime);box-shadow:none}
.footer-brand strong{display:block;color:#F5F4EF;font-size:16px;font-weight:800;line-height:1.3}
.footer-brand em{display:block;font-style:normal;font-size:12px;letter-spacing:.16em;color:rgba(245,244,239,.55)}
.footer-col p{line-height:1.9;font-size:13.5px}
.footer-col h4{font-size:14px;color:#F5F4EF;letter-spacing:.06em;margin-bottom:14px}
.footer-col li{margin-bottom:10px;font-size:13.5px;line-height:1.7}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line-dark);
  font-size:13px;color:rgba(245,244,239,.6);
}

/* 返回顶部 */
.back-top{
  position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;
  background:var(--brand);color:var(--lime);display:grid;place-items:center;
  font-size:18px;box-shadow:var(--sh-2);z-index:70;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
}
.back-top.is-visible{opacity:1;visibility:visible;transform:none}
.back-top:hover{background:var(--brand-dark)}

/* 断点 */
@media (max-width:1279px){
  .layout-2col{gap:40px;grid-template-columns:236px minmax(0,1fr)}
  .hero-title{font-size:clamp(30px,4vw,46px)}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .section-tight{padding:56px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero-metrics{grid-template-columns:repeat(2,1fr);gap:20px}
  .layout-2col{grid-template-columns:1fr;gap:28px}
  .toc-inner{position:static}
  .toc-title{margin-bottom:12px}
  .toc-list{display:flex;gap:8px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:6px;-webkit-overflow-scrolling:touch}
  .toc-list::-webkit-scrollbar{display:none}
  .toc-list li{flex:0 0 auto;scroll-snap-align:start}
  .toc-list li a{
    border-left:0;border:1px solid var(--line);border-radius:var(--r-btn);
    padding:9px 16px;background:var(--card);font-size:13.5px;white-space:nowrap;
  }
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .cta-block{padding:72px 0}
  .mini-cards{grid-template-columns:1fr}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .announce-inner{padding:9px 18px}
  .nav-chips{display:none}
  .header-actions{padding-left:0;border-left:0}
  .nav-toggle{display:flex}
  .brand-text em{letter-spacing:.12em}
  .drawer{display:block}
  .hero-title{font-size:clamp(28px,7.4vw,36px)}
  .hero-sub{font-size:16.5px}
  .btn{height:48px;width:auto}
  .hero-actions .btn{flex:1 1 auto;min-width:150px}
  .hero-metrics{grid-template-columns:repeat(2,1fr);gap:16px;margin-top:36px}
  .content-block{padding:24px 20px;border-radius:14px}
  .step-list li{grid-template-columns:38px minmax(0,1fr);gap:12px}
  .step-num{width:36px;height:36px;font-size:13px}
  .cta-inline{padding:22px;flex-direction:column;align-items:flex-start}
  .cta-inline .btn{width:100%}
  .related-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
  .cta-block{padding:56px 0}
  .cta-block .btn{width:100%}
  .back-top{right:16px;bottom:16px}
}
@media (min-width:768px){
  .drawer{display:none}
}
@media (max-width:380px){
  .container{padding:0 14px}
  .hero-metrics strong{font-size:17px}
  .chip{font-size:13px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .card:hover,.mini-card:hover,.content-block:hover{transform:none}
  .card:hover .card-media img{transform:none}
}

/* roulang page: category2 */
:root{
  --ink:#0E3B36;
  --ink-deep:#08211F;
  --ink-float:#0B2C28;
  --lime:#C9F45B;
  --coral:#FF6B4A;
  --bg:#F5F4EF;
  --card:#FFFFFF;
  --soft:#EDEBE4;
  --text:#16181A;
  --text-2:#5A5F5C;
  --text-3:#8B9190;
  --on-dark:#F5F4EF;
  --line:#DEDCD4;
  --line-dark:rgba(245,244,239,.14);
  --r-card:16px;
  --r-img:14px;
  --r-btn:12px;
  --r-badge:8px;
  --sh-1:0 2px 8px rgba(14,59,54,.06);
  --sh-2:0 12px 32px rgba(14,59,54,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Space Grotesk","Inter","HarmonyOS Sans SC","PingFang SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3,h4{line-height:1.3;letter-spacing:-.2px}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}

/* ---------- 顶部公告 ---------- */
.announce{background:var(--ink-deep);color:var(--on-dark);font-size:13px;letter-spacing:.04em}
.announce-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:38px}
.announce-inner span{opacity:.86;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.announce-close{width:26px;height:26px;line-height:1;border-radius:50%;color:var(--on-dark);opacity:.7;flex:none;font-size:16px}
.announce-close:hover{opacity:1;background:rgba(245,244,239,.12)}

/* ---------- 头部 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:var(--bg);transition:padding .22s var(--ease),background .22s var(--ease),box-shadow .22s var(--ease)}
.header-main{border-bottom:1px solid transparent;transition:border-color .22s var(--ease),backdrop-filter .22s var(--ease)}
.header-inner{display:flex;align-items:center;gap:24px;padding-top:16px;padding-bottom:16px;transition:padding .22s var(--ease)}
.site-header.is-scrolled{background:rgba(245,244,239,.92);backdrop-filter:blur(8px)}
.site-header.is-scrolled .header-main{border-bottom-color:var(--line)}
.site-header.is-scrolled .header-inner{padding-top:10px;padding-bottom:10px}

.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{
  width:38px;height:38px;border-radius:11px;background:var(--ink);color:var(--lime);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;letter-spacing:0;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:800;letter-spacing:-.3px;color:var(--ink);white-space:nowrap}
.brand-text em{font-style:normal;font-size:12px;color:var(--text-3);letter-spacing:.16em}

.nav-chips{display:flex;align-items:center;gap:8px;flex:1 1 auto;min-width:0;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.nav-chips::-webkit-scrollbar{display:none}
.chip{
  flex:none;display:inline-flex;align-items:center;height:36px;padding:0 14px;border-radius:var(--r-badge);
  background:var(--soft);color:rgba(14,59,54,.8);font-size:14px;font-weight:600;
  border-bottom:2px solid transparent;transition:background .18s var(--ease),color .18s var(--ease);
}
.chip:hover{background:#E3E0D7;color:var(--ink)}
.chip.is-active{background:var(--ink);color:var(--on-dark);border-bottom-color:var(--lime)}

.header-actions{display:flex;align-items:center;gap:12px;flex:none;padding-left:24px;border-left:1px solid var(--line)}
.menu-toggle{display:none;width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--line);align-items:center;justify-content:center;flex-direction:column;gap:5px}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;letter-spacing:.01em;white-space:nowrap;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--lime);color:var(--ink-deep);box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--ink);color:var(--on-dark);transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-ghost{border:1px solid var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:rgba(14,59,54,.06);transform:translateY(-2px)}
.btn-on-dark{background:var(--lime);color:var(--ink-deep)}
.btn-on-dark:hover{background:var(--on-dark);color:var(--ink-deep);transform:translateY(-2px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.4;box-shadow:none;pointer-events:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--ink);transition:transform .18s var(--ease),color .18s var(--ease)}
.link-arrow::after{content:"→";transition:transform .18s var(--ease)}
.link-arrow:hover{color:var(--ink-deep)}
.link-arrow:hover::after{transform:translateX(4px)}

/* ---------- 抽屉 ---------- */
.drawer{position:fixed;inset:0;z-index:80;background:var(--bg);display:none;flex-direction:column;overflow-y:auto}
.drawer.is-open{display:flex}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--line)}
.drawer-head .brand-text strong{font-size:15px}
.drawer-close{width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--line);font-size:20px;line-height:1}
.drawer-inner{padding:18px}
.drawer-group-title{font-size:12px;letter-spacing:.18em;color:var(--text-3);margin:18px 0 8px}
.drawer-link{display:flex;align-items:center;height:56px;font-size:18px;font-weight:700;border-bottom:1px solid var(--line);color:var(--ink)}
.drawer-link.is-active{color:var(--ink);box-shadow:inset 3px 0 0 var(--lime);padding-left:12px}
.drawer-cta{margin-top:24px}

/* ---------- 面包屑 ---------- */
.crumbs{padding:20px 0 0;font-size:13px;color:var(--text-3);letter-spacing:.04em}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs li::after{content:"/";margin-left:8px;color:var(--line)}
.crumbs li:last-child::after{content:"";margin:0}
.crumbs a:hover{color:var(--ink)}
.crumbs .current{color:var(--ink);font-weight:700}

/* ---------- 页头 ---------- */
.page-head{padding:28px 0 72px}
.page-head-grid{display:grid;grid-template-columns:1.35fr .9fr;gap:56px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:700;letter-spacing:.16em;color:var(--ink);text-transform:uppercase}
.eyebrow::before{content:"";width:26px;height:10px;border-radius:3px;background:var(--lime)}
h1{font-size:50px;font-weight:800;letter-spacing:-.5px;line-height:1.15;margin:18px 0 18px;color:var(--ink-deep)}
h1 .hl{box-shadow:inset 0 -14px 0 rgba(201,244,91,.55)}
.lede{font-size:18px;color:var(--text-2);max-width:34em;margin-bottom:24px}
.head-tags{display:flex;flex-wrap:wrap;gap:8px}
.badge{display:inline-flex;align-items:center;height:28px;padding:0 10px;border-radius:var(--r-badge);font-size:13px;font-weight:700;letter-spacing:.02em}
.badge-soft{background:rgba(14,59,54,.08);color:var(--ink)}
.badge-lime{background:var(--lime);color:var(--ink-deep)}
.head-photo{position:relative}
.head-photo img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-card);box-shadow:var(--sh-2);background:var(--soft)}
.head-photo figcaption{margin-top:12px;font-size:13px;color:var(--text-3);text-align:center}
.head-photo .float-card{
  position:absolute;left:-18px;bottom:-26px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-2);padding:16px 18px;min-width:220px;
}
.head-photo .float-card strong{display:block;font-size:14px;color:var(--ink);margin-bottom:6px}
.head-photo .float-card p{font-size:13px;color:var(--text-2);line-height:1.6}

/* ---------- 通栏编号章节 ---------- */
.blocks{padding:24px 0 0}
.block{padding:64px 0;border-top:1px solid var(--line)}
.block-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.block-grid > .media{order:0}
.block-grid > .body{order:1}
.block.is-reverse .block-grid > .media{order:2}
.block.is-reverse .block-grid > .body{order:1}
.block h2{font-size:34px;font-weight:700;color:var(--ink-deep);display:flex;align-items:baseline;gap:14px;margin-bottom:18px}
.block h2 .num{
  font-family:var(--font-num);font-size:16px;font-weight:700;color:var(--ink-deep);
  background:var(--lime);border-radius:var(--r-badge);padding:3px 9px;letter-spacing:.06em;
}
.block p{color:var(--text-2);margin-bottom:16px;font-size:16.5px}
.block p strong{color:var(--ink)}
.media img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--r-card);box-shadow:var(--sh-1);background:var(--soft)}
.media figcaption{margin-top:10px;font-size:13px;color:var(--text-3)}

.point-list{margin:20px 0 0;display:grid;gap:12px}
.point-list li{position:relative;padding-left:26px;color:var(--text-2);font-size:15.5px}
.point-list li::before{
  content:"";position:absolute;left:0;top:.62em;width:10px;height:10px;border-radius:3px;
  background:var(--lime);border:1px solid var(--ink);
}
.point-list li strong{color:var(--ink)}

.steps{counter-reset:step;display:grid;gap:14px;margin-top:22px}
.steps li{
  counter-increment:step;position:relative;padding:16px 18px 16px 58px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);
  font-size:15.5px;color:var(--text-2);transition:box-shadow .2s var(--ease),transform .2s var(--ease);
}
.steps li::before{
  content:counter(step,decimal-leading-zero);position:absolute;left:16px;top:15px;
  font-family:var(--font-num);font-size:15px;font-weight:700;color:var(--ink);
  background:var(--soft);border-radius:var(--r-badge);padding:2px 8px;
}
.steps li:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.steps li strong{color:var(--ink)}

.mini-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:26px}
.mini-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px 22px;box-shadow:var(--sh-1);transition:box-shadow .2s var(--ease),transform .2s var(--ease);
}
.mini-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.mini-card .idx{font-family:var(--font-num);font-size:13px;font-weight:700;letter-spacing:.1em;color:var(--ink);background:var(--soft);border-radius:var(--r-badge);padding:3px 9px;display:inline-block;margin-bottom:14px}
.mini-card h3{font-size:19px;color:var(--ink-deep);margin-bottom:8px}
.mini-card p{font-size:14.5px;color:var(--text-2);line-height:1.75}

/* ---------- 中段 CTA 条 ---------- */
.inline-cta{
  margin:8px 0 0;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  background:var(--soft);border:1px solid var(--line);border-radius:var(--r-card);padding:26px 30px;
}
.inline-cta p{margin:0;font-size:17px;font-weight:700;color:var(--ink-deep)}
.inline-cta span{display:block;font-size:14px;font-weight:400;color:var(--text-2);margin-top:4px}
.inline-cta .cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- FAQ ---------- */
.faq-block{padding:72px 0;border-top:1px solid var(--line)}
.section-head{margin-bottom:32px;max-width:44em}
.section-head h2{font-size:34px;font-weight:700;color:var(--ink-deep);margin-bottom:10px}
.section-head p{color:var(--text-2);font-size:16px}
.faq-list{border-top:1px solid var(--line)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;font-size:18px;font-weight:700;color:var(--ink-deep);
}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{
  content:"+";font-family:var(--font-num);font-size:22px;color:var(--ink);flex:none;transition:transform .2s var(--ease);
}
.faq-list details[open] summary::after{transform:rotate(45deg)}
.faq-list summary:hover{color:var(--ink)}
.faq-answer{padding:0 0 24px 14px;color:var(--text-2);font-size:16px;max-width:60em}

/* ---------- 深色 CTA ---------- */
.cta-dark{position:relative;background:var(--ink-deep);color:var(--on-dark);padding:96px 0;overflow:hidden}
.cta-dark::before{
  content:"";position:absolute;inset:0;background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;opacity:.08;
}
.cta-dark .container{position:relative;z-index:1}
.cta-dark h2{font-size:38px;font-weight:700;letter-spacing:-.4px;margin-bottom:14px;color:var(--on-dark)}
.cta-dark p{color:rgba(245,244,239,.72);font-size:17px;max-width:40em;margin-bottom:30px}
.cta-dark .cta-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.cta-dark .link-arrow{color:var(--on-dark)}
.cta-dark .link-arrow:hover{color:var(--lime)}

/* ---------- 相关文章 ---------- */
.related{padding:80px 0;border-top:1px solid var(--line)}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:box-shadow .22s var(--ease),transform .22s var(--ease);
}
.rel-card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.rel-media{position:relative;background:var(--soft);overflow:hidden}
.rel-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .24s var(--ease)}
.rel-card:hover .rel-media img{transform:scale(1.03)}
.rel-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-body h3{font-size:18px;color:var(--ink-deep);line-height:1.45}
.rel-body p{font-size:14.5px;color:var(--text-2);flex:1}
.rel-meta{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-3)}
.back-home{margin-top:36px;text-align:center}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-deep);color:rgba(245,244,239,.76);padding:72px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{background:rgba(245,244,239,.08);color:var(--lime)}
.footer-brand strong{display:block;color:var(--on-dark);font-size:16px;font-weight:800}
.footer-brand em{font-style:normal;font-size:12px;letter-spacing:.16em;color:rgba(245,244,239,.5)}
.footer-col p{line-height:1.9;font-size:13.5px;color:rgba(245,244,239,.66)}
.footer-col h4{font-size:14px;color:var(--on-dark);margin-bottom:16px;letter-spacing:.04em}
.footer-col ul{display:grid;gap:10px}
.footer-col a{color:rgba(245,244,239,.7);transition:color .18s var(--ease)}
.footer-col a:hover{color:var(--lime)}
.footer-col li{font-size:13.5px}
.footer-bottom{
  border-top:1px solid var(--line-dark);padding:20px 0 28px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(245,244,239,.5);
}

/* ---------- 返回顶部 ---------- */
.back-top{
  position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:50%;
  background:var(--ink);color:var(--lime);display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
  z-index:70;font-size:18px;
}
.back-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{background:var(--ink-deep)}

/* ---------- 断点 ---------- */
@media (max-width:1279px){
  h1{font-size:44px}
  .block h2,.section-head h2{font-size:30px}
  .cta-dark h2{font-size:34px}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:32px}
  .footer-col:last-child{grid-column:span 3}
}
@media (max-width:1023px){
  .nav-chips{display:none}
  .menu-toggle{display:flex}
  .header-actions{padding-left:16px}
  .page-head-grid{grid-template-columns:1fr;gap:36px}
  .head-photo{order:-1}
  .head-photo .float-card{position:static;margin-top:14px;box-shadow:var(--sh-1)}
  .related-grid,.mini-grid{grid-template-columns:repeat(2,1fr)}
  .block{padding:48px 0}
}
@media (max-width:900px){
  .block-grid{display:flex;flex-direction:column;gap:28px}
  .block-grid > .media,.block-grid > .body{order:0}
}
@media (max-width:767px){
  .container{padding:0 18px}
  h1{font-size:32px}
  .lede{font-size:16.5px}
  .block h2,.section-head h2{font-size:26px}
  .cta-dark h2{font-size:28px}
  .cta-dark{padding:56px 0}
  .block{padding:44px 0}
  .faq-block,.related{padding:56px 0}
  .related-grid,.mini-grid,.footer-grid{grid-template-columns:1fr}
  .footer-col:last-child{grid-column:auto}
  .inline-cta{padding:22px}
  .btn{height:44px}
  .inline-cta .cta-actions{width:100%}
  .inline-cta .cta-actions .btn{flex:1 1 auto}
  .site-footer{padding-top:56px}
}
@media (max-width:380px){
  h1{font-size:28px}
  .brand-text strong{font-size:14px}
  .brand-text em{display:none}
  .btn{padding:0 16px;font-size:14px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .btn:hover,.mini-card:hover,.rel-card:hover,.steps li:hover{transform:none}
}